/*
 * This template is valid both in C and in C++,
 * so you can expand it with code from both languages.
 */

#include <assert.h>
#include <stdio.h>

// constraints
#define MAXN 100000

// input data
int N, K, i;
int D[MAXN];

int main() {
    //  uncomment the following lines if you want to read/write from files
    //  freopen("input.txt", "r", stdin);
    //  freopen("output.txt", "w", stdout);

    assert(2 == scanf("%d %d", &N, &K));
    for (i = 0; i < N; i++) assert(1 == scanf("%d", &D[i]));

    // insert your code here

    printf("%d\n", 42);  // change 42 with actual answer
    return 0;
}